Japan has floating solar power plants in Hyogo Prefecture

Japan has floating solar power plants in Hyogo Prefecture

Kyocera is in the news this month. Two floating solar power plants in two reservoirs in Kato City, Hyogo Prefecture, Japan, are complete. This is a joint venture. The two players are Kyocera and Century Tokyo Leasing, which is in the business of equipment leasing. Construction started last year in September. They use 255-watt Kyocera modules, 11,256 modules in total.

The 11,256 Kyocera modules are affixed to specially developed floating platforms, attached to the lakebeds, said RenewablesBiz.com.

The plants are on Nishihira Pond and Higashihira Pond. Capacity on Nishihira is 1.7MW. Capacity on Higashihira is 1.2MW. Tom Kenning reported in PV-Tech.org, which covers the solar PV supply chain, that, combined, the plants will generate enough to power 920 households.

The electricity generated will be sold to the local utility, Kansai Electric Power, through Japan's feed-in-tariff system. BusinessGreen commented that the feed-in-tariff system "has played a key role in establishing Japan as one of the world's largest solar markets in recent years." Liat Clark in Wired.co.uk made the observation that "Solar power is booming in Japan; the nation doubled its capacity within two years of the 2011 Fukushima nuclear disaster, and is now a world leader along with China and the US."

What is the advantage of a "floating" solar power system design? Kyocera said the cooling effect of the water results in more electricity generated than with ground-mount and rooftop systems. Also, by shading the water, they reduce reservoir water evaporation and algae growth.

The platforms use high-density polyethylene, which can withstand ultraviolet rays and resist corrosion. The floating plants are said to be engineered to withstand typhoon conditions.

This is not the last you will hear of floating plants. Liat Clark in Wired.co.uk said "floating are having a moment in the sun." He said some "are starting to appear in the UK, while larger scale projects are also planned in California's wine country." BusinessGreen also mentioned plans for arrays on reservoirs in California. Last year, Young-Kwan Choi of the Korea Water Resources Corporation, discussed at length Floating PV Systems in terms of power generation and environmental impact. He wrote that the floating PV system demonstrated in his paper was a new way of generating solar energy, using the water surface that is available on dams, reservoirs and other bodies of water. "This method has an advantage that allows efficient use of the nation's soil without bringing damages to the environment." His paper compared and analyzed the empirical data of the floating PV system that K-water installed with that of the existing overland PV. The author verified that the generating efficiency of floating PV system was superior by 11 percent and more (the floating PV system has 11 percent better generation efficiency than overland equivalents.)

His paper was published in the International Journal of Software Engineering and Its Applications.


Explore further

First floating solar farm in UK comes to life in Berkshire

More information: global.kyocera.com/news/2015/0401_tome.html

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Apr 24, 2015
Neat. I will be interesting to see if there are any downsides (e.g. stagnant water due to less interaction with wind. But seen from an aerial view it looks like the surrounding water body should provide for enough.)

Apr 24, 2015
Water is stagnant for half the year in cold climates. It 'turns over' in the spring when the ice melts. There would never be a cover like ice on a surface with modular pv units.

Apr 24, 2015
It is a fantastic CO2 reduction. Solar panels by absorbing/blocking sunlight will prevent aquatic plants/phytoplankton and zooplankton from releasing carbon dioxide and other harmful biological gases to the atmosphere. Renewables are becoming ever more eco-friendly (or ever more hypocrite).


Apr 24, 2015
Just Draw a Chain of Structures over a Volcano so that they are fully Charged up by Heat Energy by the time they reach the other end of the Volcano!

Apr 24, 2015
It's literally a cool setup.

But there's again this perennial problem:

Capacity on Nishihira is 1.7MW. Capacity on Higashihira is 1.2MW. Tom Kenning reported in PV-Tech.org, which covers the solar PV supply chain, that, combined, the plants will generate enough to power 920 households.


The average household in Japan consumes 5.5 MWh of electricity per year. 920 households consume ~5,000 MWh a year.

The total capacity of the plants is 2.9 MWh and at full output they would produce 25,400 MWh a year. Therefore the capacity factor of the plants must be 19.7% to meet the claimed output.

The average capacity factor of PV in Japan is actually 11.4% and even with the 11% increase in power production from the cooling effect, would not exceed 12.7%

Therefore the article is exaggerating the energy production by 55%

This sort of slight happens, without fail, in every single article where renewables are measured in "households".

Apr 24, 2015
And the abovementioned problem tracks back to the source article:

http://www.pv-tec...mpletion
The WEC statistics puts Japan at 5,513 kWh per household per year instead of the 3,590 kWh claimed by the PVtech article.

920 households sounds impressive. That's nearly a thousand.
590 households... not so much.

Makes it seem like the whole technology is much further along than it really is.

Apr 24, 2015
Also, by shading the water, they reduce reservoir water evaporation
Yeah this occurred to me and I wondered if they were doing this in california to conserve water and I found this:

"What will be, once completed, the largest floating solar photovoltaic (PV) project in the US is now under development in California by the company Pristine Sun, according to recent reports.

"The project array — which will be situated on 6 wastewater ponds (filled with treated sewage) in Sonoma County — is currently slated to be completed in 2016, and will, once completed, provide enough electricity to power roughly 3,000 Californian homes. It will have a power output capacity of 12.5 megawatts."

-Thats 3,000 eikka.

-Instead of covering wastewater ponds they should be covering reservoirs-

Apr 24, 2015
-Thats 3,000 eikka.


Californian average household consumption: ~6,400 kWh/a
Comes out at a capacity factor of 17.5% which is in the right ballpark for PV power in California.

The total factor for solar power in California is about 24% because concentrated solar thermal plants run more hours per day on stored heat. CSP with molten salt storage has an arbitrary capacity factor because you can size the generator independently of the collector area. If you install a smaller generator, you can run it all day all night with the accumulated heat.

Which is one reason why it's a far better idea than photovoltaic power.

Apr 25, 2015
Well I suppose you could design CSPs to cover reservoirs as well. And you could figure the amount of water saved from evaporation vs increased cost of such a system vs the desalination potential of the power produced.

Apr 25, 2015
Eratosthenes first measured the circumference of the earth from the shadows cast by the sun. Today, humanity's fitness to survive will be measured by our ability to conquer that same thermonuclear fusion that casts those shadows. Thus, Prometheus will truly be unbound.
http://thingumbob...eas.html


Apr 25, 2015
"Eratosthenes first measured the circumference of the earth from the shadows cast by the sun. Today, humanity's fitness to survive will be measured by our ability to conquer that same thermonuclear fusion that casts those shadows. Thus, Prometheus will truly be unbound."

My god thats so deep I either want to cry or puke. What to do? I paid good money for lunch-

fay
Apr 25, 2015
and what is the cost?

Apr 25, 2015
Solar power is a waste. http://thingumbob...-is.html

I can't tell if you are joking or just stupid.

Apr 27, 2015
"Well I suppose you could design CSPs to cover reservoirs as well. And you could figure the amount of water saved from evaporation vs increased cost of such a system vs the desalination potential of the power produced."
------------------------------------------------------

Where you going to put the tower? How do you keep the heliostats pointed directly at the target if they float in water in a big reservoir?

Good for line-focus and other PV, but not with CSP, which also uses molten salts.

Apr 27, 2015
"Where you going to put the tower? How do you keep the heliostats pointed directly at the target if they float in water in a big reservoir?

Good for line-focus and other PV, but not with CSP, which also uses molten salts..."

-Well these are things that engineers would have to work out which is why you ask such ignorant questions about them.

Look at the picture above - how are they keeping all those panels in place? No dont think about it for too long - youll get a headache.

Re the tower - how do they keep marine wind turbines from falling over? Dont hurt yourself on that one.

Re molten salts - now thats a real puzzle. Are you suggesting that insulated piping is too problematic for use underwater? Or are you just throwing terms around again to imply you know stuff you obviously dont?
http://www.fmctec...ion.aspx

Apr 27, 2015
otto, you are completely ignorant of how CSP works!!

And I evaluated a floating line-focus collector system in the Valley 25 years ago. Water was used because they tracked the sun, and it provided a good platform for it.

CSP uses heliostats which track the Sun to put the reflection on the top of a high tower with molten salts with decent specific heat. Ever heard that term? More important than that is the energy stored in the Heat of Fusion,which allows them to store the power thermally.

The heat then runs turbines. It is not solid state like PV.


Apr 27, 2015
... you are completely ignorant of how CSP works!!

"Concentrated Solar Power" (CSP) works very well to cook birds in midair.
http://en.wikiped...wildlife

Apr 27, 2015
48 Sieverts kills everything.

Apr 28, 2015
"And I evaluated a floating line-focus collector system in the Valley 25 years ago. Water was used because they tracked the sun, and it provided a good platform for it."

-Yah I know George you've done everything. In your mind. This is the same mind that makes you think you're an engr when you're obviously not.

You haven't provided an explanation of why you don't think floating CSP would work. Only empty claims of authority as evidence that we should accept your judgment without questioning it. Typical stinking smelly bullshit.

WHY wouldn't it work gkam??

Apr 28, 2015
Let me answer that question for you. It wouldn't work, in your mind, because you think your mind is all there is.

Meanwhile here is but one of many examples of how floating CSP is actually being designed and built. By real engineers, not play ones.
http://inhabitat....zerland/

-It's also one of many examples of how we can tell you're full of shit.

Apr 28, 2015
Thank you, otto!

You have finally proved your ignorance and lack of care. Those are PV systems, NOT CSP. The reason they are floating is so they can track the Sun without complex mounts, just like the ones I examined for PG&E 30 years ago.

All the time we have been going at it, you have thrown filthy words and accusations at me. Now it is time for you to go, otto.

I was a REAL engineer, otto, not whatever you might have been.

Now, go look up Concentrated Solar Power and get back to me. We use it in California to feed into our grid. How about there in Coal Country?

Hilarious!!

Hilarious!


Apr 28, 2015
"WHY wouldn't it work gkam?? "

I am answering this just because. CSP needs hundreds of precisely-oriented heliostats which track the Sun and put its reflection onto a very tall tower, where special salts get heated by it. The heat is used to drive turbines, and some can be stored in the heat of fusion to produce power aft3er the Sun is down. Look it up.

I want you to show me how to easily put floating heliostasts and a floating power tower and make it work.

Apr 28, 2015
You didn't read the article or watch the vid. Those ARE CSP.

And yes you are a real piece of shit.

Apr 28, 2015
They call it CSP, but it is PV, as it admits at the end of the post.

Here are the words from your Wiki:
Concentrated solar power (also called concentrating solar power, concentrated solar thermal, and CSP) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a small area. Electricity is generated when the concentrated light is converted to heat, which drives a heat engine (usually a steam turbine) connected to an electrical power generator or powers a thermochemical reaction (experimental as of 2013).[1][2][3]

CSP is not to be confused with concentrated photovoltaics (CPV). In CPV, the concentrated sunlight is converted directly to electricity via the photovoltaic effect.

Did you notice yours was PV?

Apr 28, 2015
No retard you didn't watch the vid did you? What makes you think I don't know the fucking difference?

You're an amateur. You're only aware of one type. Engrs are made aware of all types.

You're no engr.

Apr 28, 2015
otto says: "And yes you are a real piece of shit."

But he reveals more about himself than about me.

Let's get back to Alternative Energy.

Apr 28, 2015
"What makes you think I don't know the fucking difference?"
---------------------------------------

Your complete lack of professionalism, plus all I had to teach you about nuclear power, specific heats, linear accelerators, and what engineers do for a living.

Hilarious!

Apr 28, 2015
As a rank amateur you're not qualified to discuss it.

Apr 28, 2015
Thanks, otto.

Case closed.

Apr 28, 2015
"Case closed."

-Sorry weasel the case is not closed. You hevent explained yet why you didnt recognize a CSP system when shown one. You havent explained why you didnt think that the one CSP system you happen to be familiar with, couldnt be installed on a similar island membrane structure as the one n the vid.

And you havent explained how you came to the conclusion that the tower of the CSP system you are familiar with, couldnt be installed in water, as wind turbines often are.

Let me offer an explanation: you never learned to design like a PE. Instead, you learned to how to copy design processes for specific applications from legitimate engineers.

And so when someone mentions CSP for instance the only thing that comes to mind is the one system you are familiar with. It doesnt occur to you that there may be other possible solutions. IOW you never learned to synthesize.

For this you need the broad formal education and experience that real engrs are required to have.

Apr 28, 2015
As far as obscenities go, I think that many professionals, upon being disgusted with the stuff you have the nerve to post here, would have few other words left to adequately describe it.

Apr 28, 2015
otto, it is NOT a CSP system. It was made in the spirit of CSP, but is PV.

Go read it again. DO IT!

Apr 28, 2015
otto, I read it, and it does have some thermal workings. I am surprised. It is not built yet, and we do not know if it will work with required efficacy, but it is a start.

It is not the regular proven CSP, but a different type, in test.

Good luck to them.
Again, they are on water for tracking.

"As far as obscenities go, I think that many professionals, upon being disgusted with the stuff you have the nerve to post here, would have few other words left to adequately describe it."
---------------------------------

You are not a professional otto. I proved to you I was in several fields and am a real person. You are STILL a cowardly sniper hiding behind a pseudonym screaming nasties, as if you had no parents.

Apr 28, 2015

"It is not the regular proven CSP, but a different type, in test"

-Again you display your ignorance.
http://solareis.a...SP_3.pdf

-The only difference is the rotating barge. Proud of your hubris?

Explain please why your heliostats couldnt be installed on either a rotating 'barge' as shown in the vid, or a stationary one.

Explain why a CSP tower couldnt be installed in a reservoir.

Explain why insulated piping couldnt be used to transfer molten salts onshore.

Apr 28, 2015
"You are not a professional otto. I proved to you I was in several fields"

-Well thats a lie.

"A profession arises when any trade or occupation transforms itself through "the development of formal qualifications based upon education, apprenticeship, and examinations, the emergence of regulatory bodies with powers to admit and discipline members, and some degree of monopoly rights."

"Originally, any regulation of the professions was self-regulation... With the growing role of government, statutory bodies have increasingly taken on this rôle, their members being appointed either by the profession or (increasingly) by government."

"Besides regulating access to a profession, professional bodies may set examinations of competence and enforce adherence to an ethical code."

-By your own admission you arent qualified. And you are certainly beholden to no ethical code because you lie through your teeth about what you know and how you know it.

Apr 28, 2015
And pretending to be a professional can get you a felony conviction. Ever been on this list?
http://www.bpelsg...ed.shtml

-You know I must apologize. I totally blew over this post of yours...
And I evaluated a floating line-focus collector system in the Valley 25 years ago. Water was used because they tracked the sun, and it provided a good platform for it.
So. You 'evaluated' a CSP system, floating to boot, 25 years ago and didnt know what it was???

Did you 'evaluate' it for aesthetic purposes maybe? Environmental impact statement?

Apr 28, 2015
Gosh, otto, for once you found something new I had not seen. It is not operational, but you were correct for the very first time!

Now, you show me how to mount those heliostats and the power tower on the water. The power tower is a very different type of CSP, in fact the real one. I want to see how you stabilize and keep them pointed exactly at that target a hundred meters away. Show me.

But apologize first. You continue to invent crimes I have committed, yet you are still a nobody, a figment of the imagination of someone with no social skills, a sniper, a hide-and-run agent, someone who admitted he was on here in his pseudonyms to "play games".

Hilarious.

Apr 28, 2015
WHAT are you talking about??? YOU evaluated a floating system 25 yrs ago which is exactly what the article I posted is using. AND yours tracked in altitude as they normally do. THE ONLY DIFFERENCE is they put it on a rotating barge which provides azimuth tracking.

WHAT MAKES YOU THINK that your favorite heliostat-based system of panels couldnt be installed on a similar stationary membrane structure?
https://www.youtu...yR3YOVZQ

-And why is it that you cant conceive of tower structures built in the water?
http://naturalgas...form.gif
http://i.livescience.com/images/i/000/005/993/original/060918_wind_turbine_02.jpg?1296085876

-Why? Because youre NOT AN ENGR.


Apr 28, 2015
I started to correct you again. But it is not needed. This is just another of your "games" of which you are so proud. But I have to ask: Are you 166 and Da Schneib, too?

Bye, otto-wiki, . . . .


Apr 28, 2015
George doesnt know CSP. George doesnt know anything about marine structures. But george THINKS he does, and to prove it to himself he dredges up old jobs from 40 years which he cant quite recall.

Nobody here falls for that shit george. How come you do?

May 05, 2015
Floating Solar Power Systems are wonderful Ideas. And it's very important to maintain effectively same direction and position on the water for floating solar plants. Because directional change of solar panels reduces electricity production. So floating solar plants also need the directional control mooring systems for their parked positions. Azimuth and position change of floating solar plants caused by wind, waves and external forces. Restoring Force Strengthened Mooring System for floating solar plants has been created in South Korea. This Mooring System generates Restoring Force immediately when floating solar plants are being rotated or moved on the water. Recently, Restoring Force Strengthened Mooring Systems have been used in South Korea. You can see the Restoring Force Strengthened Mooring System in Ochang Dam, South Korea. I N I WORLD

May 05, 2015
Floating Solar Power Systems are wonderful Ideas. And it's very important to maintain effectively same direction and position on the water for floating solar plants. Because directional change of solar panels reduces electricity production. So floating solar plants also need the directional control mooring systems for their parked positions. Azimuth and position change of floating solar plants caused by wind, waves and external forces. Restoring Force Strengthened Mooring System for floating solar plants has been created in South Korea. This Mooring System generates Restoring Force immediately when floating solar plants are being rotated or moved on the water. Recently, Restoring Force Strengthened Mooring Systems have been used in South Korea. You can see the Restoring Force Strengthened Mooring System in Ochang Dam, South Korea. I N I WORLD

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